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Preparation and Structural Analysis of Magnesium Oxide Aerogels

Published online by Cambridge University Press:  15 May 2017

Jiankai Zhang ,
Xiaohong Chen ,
Ran Liu ,
Huaihe Song  and
Zhihong Li
Jiankai Zhang
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Xiaohong Chen*
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Ran Liu
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Huaihe Song
Affiliation:
State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
Zhihong Li
Affiliation:
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
*
*(Email: chenxh@mail.buct.edu.cn)
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Abstract

Magnesium oxide aerogels were made by sol-gel process using magnesium methoxide as precursor, methanol and deionized water as solvent with ethanol supercritical fluid drying. The influences of the different factors on the gel time and the specific surface area of magnesium oxide aerogels were studied, and the structure and morphology were characterized by Scanning Electron Microscopy (SEM), Transmission Electron Microscope (TEM) and X-ray diffraction (XRD), and the Small Angle X-ray Scatter (SAXS) was utilized to determine the fractural structure of the magnesium oxide aerogels. The results show that MgO aerogels belong to the typical mesoporous materials with rich network and highly developed pore structure, and the specific surface area is 904.9 m2/g, the apparent density is 0.055 g/cm3, the average pore size is 19.6 nm. The results of SAXS analysis show that the fractal dimension of the MgO aerogels is 2.32 in high q area which proves the existence of rough surface and pore fractal structure.

Keywords

aerogelsol-gelfractal

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Type
Articles
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MRS Advances , Volume 2 , Issue 57: Nanomaterials , 2017 , pp. 3505 - 3510
Copyright
Copyright © Materials Research Society 2017 

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